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Chemical treatment of coir fiber reinforced polypropylene composites / Md. Mominul Haque in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 3958–3965 Titre : Chemical treatment of coir fiber reinforced polypropylene composites Type de document : texte imprimé Auteurs : Md. Mominul Haque, Auteur ; Md. Ershad Ali, Auteur ; Mahbub Hasan, Auteur Année de publication : 2012 Article en page(s) : pp. 3958–3965 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Fiber  Polypropylene  composites Résumé : Agro-based renewable materials have received significant attention in recent years because of their low cost, light weight, ecofriendliness, and worldwide environmental awareness. In the present work, coir fiber reinforced polypropylene composites were manufactured using injection molding method. Raw coir was chemically treated with benzene diazonium salt in alkali, acidic, and neutral media separately in order to increase the compatibility between the coir fiber and polypropylene composite. During chemical treatment, hydrophilic -OH groups in the raw coir cellulose were converted to hydrophobic -O–Na groups. Both raw and treated coir at 10, 15, 20, 25, 30, and 35 wt % were utilized during composite manufacturing. Microstructural analysis and mechanical tests were conducted. Alkali treated specimens yielded the best set of mechanical properties. On the basis of fiber loading, 30% fiber reinforced composites had the optimum set of mechanical properties among all composites manufactured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200693v [article] Chemical treatment of coir fiber reinforced polypropylene composites [texte imprimé] / Md. Mominul Haque, Auteur ; Md. Ershad Ali, Auteur ; Mahbub Hasan, Auteur . - 2012 . - pp. 3958–3965. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 3958–3965 Mots-clés : Fiber  Polypropylene  composites Résumé : Agro-based renewable materials have received significant attention in recent years because of their low cost, light weight, ecofriendliness, and worldwide environmental awareness. In the present work, coir fiber reinforced polypropylene composites were manufactured using injection molding method. Raw coir was chemically treated with benzene diazonium salt in alkali, acidic, and neutral media separately in order to increase the compatibility between the coir fiber and polypropylene composite. During chemical treatment, hydrophilic -OH groups in the raw coir cellulose were converted to hydrophobic -O–Na groups. Both raw and treated coir at 10, 15, 20, 25, 30, and 35 wt % were utilized during composite manufacturing. Microstructural analysis and mechanical tests were conducted. Alkali treated specimens yielded the best set of mechanical properties. On the basis of fiber loading, 30% fiber reinforced composites had the optimum set of mechanical properties among all composites manufactured. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200693v

Mechanical and morphological properties of chemically treated coir-filled polypropylene composites / Md. Nazrul Islam in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10491–10497 Titre : Mechanical and morphological properties of chemically treated coir-filled polypropylene composites Type de document : texte imprimé Auteurs : Md. Nazrul Islam, Auteur ; Md. Mominul Haque, Auteur ; Md. Monimul Huque, Auteur Année de publication : 2010 Article en page(s) : pp. 10491–10497 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mechanical--Morphological--Chemically  Treated--Coir-Filled--Polypropylene  Composites Résumé : In the present work, coir was chemically treated first with sodium perchlorate and then with 2,4-dinitrophenyl hydrazine (DNPH) to improve the mechanical properties of the coir−PP composites. Untreated, oxidized, and DNPH-treated coir samples at different mixing ratios were utilized to prepare the composites. Mechanical properties of the composites prepared from both perchlorate and DNPH-treated coir were found to be better than those of untreated ones. The tensile strengths of both untreated and treated coir−PP composites decreased with an increase in fiber content. However, the values were found to be higher than those of corresponding values of untreated ones. Treated coir−PP composites were found to absorb a lower amount of water than the untreated ones. To understand why the mechanical properties of composites prepared under different conditions of coir were different, surface morphologies of the tensile fractured surfaces of the specimens were recorded using scanning electron microscopy (SEM). The SEM images clearly revealed that there were fewer fiber agglomerations, microvoids, and fiber pull out traces in both perchorate and DNPH-treated coir−PP composite than in the untreated one, indicating that better distribution of the fiber into the matrix as well as stronger fiber matrix interfacial adhesion occurred upon treatment of coir. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900824c [article] Mechanical and morphological properties of chemically treated coir-filled polypropylene composites [texte imprimé] / Md. Nazrul Islam, Auteur ; Md. Mominul Haque, Auteur ; Md. Monimul Huque, Auteur . - 2010 . - pp. 10491–10497. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10491–10497 Mots-clés : Mechanical--Morphological--Chemically  Treated--Coir-Filled--Polypropylene  Composites Résumé : In the present work, coir was chemically treated first with sodium perchlorate and then with 2,4-dinitrophenyl hydrazine (DNPH) to improve the mechanical properties of the coir−PP composites. Untreated, oxidized, and DNPH-treated coir samples at different mixing ratios were utilized to prepare the composites. Mechanical properties of the composites prepared from both perchlorate and DNPH-treated coir were found to be better than those of untreated ones. The tensile strengths of both untreated and treated coir−PP composites decreased with an increase in fiber content. However, the values were found to be higher than those of corresponding values of untreated ones. Treated coir−PP composites were found to absorb a lower amount of water than the untreated ones. To understand why the mechanical properties of composites prepared under different conditions of coir were different, surface morphologies of the tensile fractured surfaces of the specimens were recorded using scanning electron microscopy (SEM). The SEM images clearly revealed that there were fewer fiber agglomerations, microvoids, and fiber pull out traces in both perchorate and DNPH-treated coir−PP composite than in the untreated one, indicating that better distribution of the fiber into the matrix as well as stronger fiber matrix interfacial adhesion occurred upon treatment of coir. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900824c